Ski boot buckle



FIG. 1 is a top plan view of a ski boot buckle showing our new design;

FIG. 2 is a front elevational view thereof, the rear being a mirror image thereof;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a right end elevational view thereof;

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a ski boot buckle, as shown and described. 